Answer:
the answer is I know and why the heck does it say TR for 7/4 3 1 that's just confusing honestly I can't stop that cuz I'm a middle schooler and your that's probably a high school thing
Explanation:
and I will explain stuff to step how why I said that because I don't know what the answer is and why am I doing this feedback because I need points too bad too sad I'm not going to help you please because if you say that someone's not going to want to help you you're just going to think of me so sorry too bad for you so sad bye have a horrible day
TR(437) - TR(431) = 2,607
First, you find the value of the triangular numbers.
TR(437) = (1+437)*437 = (438/2)*437 = 219*437 = 95,703
2
TR (431) = (1+431)*431 = (432/2)*431 = 216*431 = 93,096
Then, you subtract 95,703 - 93,096 = 2,607
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